<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>TodoList</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="inputValue">
        <button @click="handleBtnClick">提交</button>
        <ul>
            <todo-item  :content="item" 
                        :index="index"
                        v-for="(item, index) in list"
                        @delete="handleItemDelete">
            </todo-item>
        </ul>
    </div>
    <script>
        //全局组件
        // Vue.component("TodoItem", {
        //     props:['content'],
        //     template: "<li>{{content}}</li>"
        // })

        //局部组件
        var TodoItem = {
            props: ['content', 'index'],
            template:"<li @click='handleItemClick'>{{content}}</li>",
            methods: {
                handleItemClick: function() {
                    this.$emit("delete", this.index);
                }
            },
            
        }

        var app = new Vue({
            el: '#app',
            components: {
                TodoItem: TodoItem
            },
            data: {
                list: [],
                inputValue: ''
            },
            methods: {
                handleBtnClick: function() {
                    this.list.push(this.inputValue);
                    this.inputValue = '';
                },
                handleItemDelete: function(index) {
                    this.list.splice(index, 1);
                }
            },
        })
    </script>
</body>
</html>